#include "breakpoints.h"
#include "flash.h"
#include "target_request.h"
+#include "configuration.h"
#include <string.h>
#include <errno.h>
#define _DEBUG_GDB_IO_
#endif
+extern int gdb_error(connection_t *connection, int retval);
static unsigned short gdb_port;
+static const char *DIGITS = "0123456789abcdef";
+
+static void gdb_log_callback(void *priv, const char *file, int line,
+ const char *function, const char *string);
enum gdb_detach_mode
{
int gdb_use_memory_map = 0;
int gdb_flash_program = 0;
+/* if set, data aborts cause an error to be reported in memory read packets
+ * see the code in gdb_read_memory_packet() for further explanations */
+int gdb_report_data_abort = 0;
+
int gdb_last_signal(target_t *target)
{
switch (target->debug_reason)
case DBG_REASON_NOTHALTED:
return 0x0; /* no signal... shouldn't happen */
default:
- ERROR("BUG: undefined debug reason");
- exit(-1);
+ USER("undefined debug reason %d - target needs reset", target->debug_reason);
+ return 0x0;
+ }
+}
+
+#ifndef _WIN32
+int check_pending(connection_t *connection, int timeout_s, int *got_data)
+{
+ /* a non-blocking socket will block if there is 0 bytes available on the socket,
+ * but return with as many bytes as are available immediately
+ */
+ struct timeval tv;
+ fd_set read_fds;
+ gdb_connection_t *gdb_con = connection->priv;
+ int t;
+ if (got_data==NULL)
+ got_data=&t;
+ *got_data=0;
+
+ if (gdb_con->buf_cnt>0)
+ {
+ *got_data = 1;
+ return ERROR_OK;
}
+
+ FD_ZERO(&read_fds);
+ FD_SET(connection->fd, &read_fds);
+
+ tv.tv_sec = timeout_s;
+ tv.tv_usec = 0;
+ if (select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)
+ {
+ /* This can typically be because a "monitor" command took too long
+ * before printing any progress messages
+ */
+ if (timeout_s>0)
+ {
+ return ERROR_GDB_TIMEOUT;
+ } else
+ {
+ return ERROR_OK;
+ }
+ }
+ *got_data=FD_ISSET(connection->fd, &read_fds)!=0;
+ return ERROR_OK;
}
+#endif
int gdb_get_char(connection_t *connection, int* next_char)
{
gdb_connection_t *gdb_con = connection->priv;
+ int retval=ERROR_OK;
#ifdef _DEBUG_GDB_IO_
char *debug_buffer;
return ERROR_OK;
}
- while ((gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0)
+ for (;;)
{
+#ifndef _WIN32
+ retval=check_pending(connection, 1, NULL);
+ if (retval!=ERROR_OK)
+ return retval;
+#endif
+ gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
+ if (gdb_con->buf_cnt > 0)
+ {
+ break;
+ }
if (gdb_con->buf_cnt == 0)
+ {
+ gdb_con->closed = 1;
return ERROR_SERVER_REMOTE_CLOSED;
+ }
#ifdef _WIN32
errno = WSAGetLastError();
usleep(1000);
break;
case WSAECONNABORTED:
+ gdb_con->closed = 1;
return ERROR_SERVER_REMOTE_CLOSED;
case WSAECONNRESET:
+ gdb_con->closed = 1;
return ERROR_SERVER_REMOTE_CLOSED;
default:
ERROR("read: %d", errno);
usleep(1000);
break;
case ECONNABORTED:
+ gdb_con->closed = 1;
return ERROR_SERVER_REMOTE_CLOSED;
case ECONNRESET:
+ gdb_con->closed = 1;
return ERROR_SERVER_REMOTE_CLOSED;
default:
ERROR("read: %s", strerror(errno));
- exit(-1);
+ gdb_con->closed = 1;
+ return ERROR_SERVER_REMOTE_CLOSED;
}
#endif
}
if (gdb_con->buf_cnt > 0)
connection->input_pending = 1;
else
- connection->input_pending = 0;
+ connection->input_pending = 0;
#ifdef _DEBUG_GDB_IO_
DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
#endif
- return ERROR_OK;
+ return retval;
}
int gdb_putback_char(connection_t *connection, int last_char)
}
else
{
- ERROR("BUG: couldn't put character back");
+ ERROR("BUG: couldn't put character back");
}
return ERROR_OK;
}
-int gdb_put_packet(connection_t *connection, char *buffer, int len)
+/* The only way we can detect that the socket is closed is the first time
+ * we write to it, we will fail. Subsequent write operations will
+ * succeed. Shudder! */
+int gdb_write(connection_t *connection, void *data, int len)
+{
+ gdb_connection_t *gdb_con = connection->priv;
+ if (gdb_con->closed)
+ return ERROR_SERVER_REMOTE_CLOSED;
+
+ if (write_socket(connection->fd, data, len) == len)
+ {
+ return ERROR_OK;
+ }
+ gdb_con->closed = 1;
+ return ERROR_SERVER_REMOTE_CLOSED;
+}
+
+int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)
{
int i;
unsigned char my_checksum = 0;
- char checksum[3];
#ifdef _DEBUG_GDB_IO_
char *debug_buffer;
#endif
for (i = 0; i < len; i++)
my_checksum += buffer[i];
+#ifdef _DEBUG_GDB_IO_
+ /*
+ * At this point we should have nothing in the input queue from GDB,
+ * however sometimes '-' is sent even though we've already received
+ * an ACK (+) for everything we've sent off.
+ */
+#ifndef _WIN32
+ int gotdata;
+ for (;;)
+ {
+ if ((retval=check_pending(connection, 0, &gotdata))!=ERROR_OK)
+ return retval;
+ if (!gotdata)
+ break;
+ if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
+ return retval;
+ WARNING("Discard unexpected char %c", reply);
+ }
+#endif
+#endif
+
while (1)
{
#ifdef _DEBUG_GDB_IO_
DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
free(debug_buffer);
#endif
- write_socket(connection->fd, "$", 1);
- if (len > 0)
- write_socket(connection->fd, buffer, len);
- write_socket(connection->fd, "#", 1);
-
- snprintf(checksum, 3, "%2.2x", my_checksum);
- write_socket(connection->fd, checksum, 2);
+ char local_buffer[1024];
+ local_buffer[0] = '$';
+ if (len+4 <= sizeof(local_buffer))
+ {
+ /* performance gain on smaller packets by only a single call to gdb_write() */
+ memcpy(local_buffer+1, buffer, len++);
+ local_buffer[len++] = '#';
+ local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf];
+ local_buffer[len++] = DIGITS[my_checksum & 0xf];
+ gdb_write(connection, local_buffer, len);
+ }
+ else
+ {
+ /* larger packets are transmitted directly from caller supplied buffer
+ by several calls to gdb_write() to avoid dynamic allocation */
+ local_buffer[1] = '#';
+ local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf];
+ local_buffer[3] = DIGITS[my_checksum & 0xf];
+ gdb_write(connection, local_buffer, 1);
+ gdb_write(connection, buffer, len);
+ gdb_write(connection, local_buffer+1, 3);
+ }
if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
return retval;
if (reply == '+')
break;
else if (reply == '-')
+ {
+ /* Stop sending output packets for now */
+ log_remove_callback(gdb_log_callback, connection);
WARNING("negative reply, retrying");
+ }
else if (reply == 0x3)
{
gdb_con->ctrl_c = 1;
if (reply == '+')
break;
else if (reply == '-')
+ {
+ /* Stop sending output packets for now */
+ log_remove_callback(gdb_log_callback, connection);
WARNING("negative reply, retrying");
+ }
else
{
ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
+ gdb_con->closed=1;
return ERROR_SERVER_REMOTE_CLOSED;
}
}
else
{
ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
+ gdb_con->closed=1;
return ERROR_SERVER_REMOTE_CLOSED;
}
}
+ if (gdb_con->closed)
+ return ERROR_SERVER_REMOTE_CLOSED;
return ERROR_OK;
}
-int gdb_get_packet(connection_t *connection, char *buffer, int *len)
+int gdb_put_packet(connection_t *connection, char *buffer, int len)
+{
+ gdb_connection_t *gdb_con = connection->priv;
+ gdb_con->busy = 1;
+ int retval = gdb_put_packet_inner(connection, buffer, len);
+ gdb_con->busy = 0;
+ return retval;
+}
+
+int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)
{
int character;
int count = 0;
} while (character != '$');
my_checksum = 0;
-
+
+ count = 0;
+ gdb_connection_t *gdb_con = connection->priv;
for (;;)
{
/* The common case is that we have an entire packet with no escape chars.
* We need to leave at least 2 bytes in the buffer to have
- * gdb_get_char() update various bits and bobs correctly.
+ * gdb_get_char() update various bits and bobs correctly.
*/
if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt+count) < *len))
{
/* The compiler will struggle a bit with constant propagation and
* aliasing, so we help it by showing that these values do not
- * change inside the loop
- */
+ * change inside the loop
+ */
int i;
char *buf = gdb_con->buf_p;
int run = gdb_con->buf_cnt - 2;
i++;
if (character == '#')
{
- /* Danger! character can be '#' when esc is
+ /* Danger! character can be '#' when esc is
* used so we need an explicit boolean for done here.
*/
done = 1;
break;
}
-
+
if (character == '}')
{
/* data transmitted in binary mode (X packet)
}
gdb_con->buf_p += i;
gdb_con->buf_cnt -= i;
- if (done)
+ if (done)
break;
- }
+ }
if (count > *len)
{
ERROR("packet buffer too small");
return ERROR_GDB_BUFFER_TOO_SMALL;
}
-
+
if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
return retval;
if (my_checksum == strtoul(checksum, NULL, 16))
{
- write_socket(connection->fd, "+", 1);
+ gdb_write(connection, "+", 1);
break;
}
WARNING("checksum error, requesting retransmission");
- write_socket(connection->fd, "-", 1);
+ gdb_write(connection, "-", 1);
}
+ if (gdb_con->closed)
+ return ERROR_SERVER_REMOTE_CLOSED;
return ERROR_OK;
}
-int gdb_output(struct command_context_s *context, char* line)
+int gdb_get_packet(connection_t *connection, char *buffer, int *len)
+{
+ gdb_connection_t *gdb_con = connection->priv;
+ gdb_con->busy = 1;
+ int retval = gdb_get_packet_inner(connection, buffer, len);
+ gdb_con->busy = 0;
+ return retval;
+}
+
+int gdb_output_con(connection_t *connection, const char* line)
{
- connection_t *connection = context->output_handler_priv;
- gdb_connection_t *gdb_connection = connection->priv;
-
char *hex_buffer;
int i, bin_size;
- /* check if output is enabled */
- if (gdb_connection->output_disable)
- {
- return ERROR_OK;
- }
-
bin_size = strlen(line);
- hex_buffer = malloc(bin_size*2 + 4);
+ hex_buffer = malloc(bin_size*2 + 2);
+ if (hex_buffer == NULL)
+ return ERROR_GDB_BUFFER_TOO_SMALL;
hex_buffer[0] = 'O';
for (i=0; i<bin_size; i++)
snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
- hex_buffer[bin_size*2+1] = '0';
- hex_buffer[bin_size*2+2] = 'a';
- hex_buffer[bin_size*2+3] = 0x0;
+ hex_buffer[bin_size*2+1] = 0;
- gdb_put_packet(connection, hex_buffer, bin_size*2 + 3);
+ gdb_put_packet(connection, hex_buffer, bin_size*2 + 1);
free(hex_buffer);
return ERROR_OK;
}
+int gdb_output(struct command_context_s *context, char* line)
+{
+ /* this will be dumped to the log and also sent as an O packet if possible */
+ USER_N("%s", line);
+ return ERROR_OK;
+}
+
int gdb_program_handler(struct target_s *target, enum target_event event, void *priv)
{
FILE *script;
struct command_context_s *cmd_ctx = priv;
-
+
if (target->gdb_program_script)
{
- script = fopen(target->gdb_program_script, "r");
+ script = open_file_from_path(target->gdb_program_script, "r");
if (!script)
{
ERROR("couldn't open script file %s", target->gdb_program_script);
INFO("executing gdb_program script '%s'", target->gdb_program_script);
command_run_file(cmd_ctx, script, COMMAND_EXEC);
fclose(script);
-
+
jtag_execute_queue();
}
-
+
return ERROR_OK;
}
switch (event)
{
case TARGET_EVENT_HALTED:
+ /* In the GDB protocol when we are stepping or coninuing execution,
+ * we have a lingering reply. Upon receiving a halted event
+ * when we have that lingering packet, we reply to the original
+ * step or continue packet.
+ *
+ * Executing monitor commands can bring the target in and
+ * out of the running state so we'll see lots of TARGET_EVENT_XXX
+ * that are to be ignored.
+ */
if (gdb_connection->frontend_state == TARGET_RUNNING)
{
+ /* stop forwarding log packets! */
+ log_remove_callback(gdb_log_callback, connection);
+
if (gdb_connection->ctrl_c)
{
signal = 0x2;
gdb_connection->frontend_state = TARGET_HALTED;
}
break;
- case TARGET_EVENT_RESUMED:
- if (gdb_connection->frontend_state == TARGET_HALTED)
- {
- gdb_connection->frontend_state = TARGET_RUNNING;
- }
- break;
case TARGET_EVENT_GDB_PROGRAM:
gdb_program_handler(target, event, connection->cmd_ctx);
break;
return ERROR_OK;
}
+
int gdb_new_connection(connection_t *connection)
{
gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
gdb_connection->ctrl_c = 0;
gdb_connection->frontend_state = TARGET_HALTED;
gdb_connection->vflash_image = NULL;
- gdb_connection->output_disable = 0;
+ gdb_connection->closed = 0;
+ gdb_connection->busy = 0;
+ /* send ACK to GDB for debug request */
+ gdb_write(connection, "+", 1);
+
/* output goes through gdb connection */
command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
/* register callback to be informed about target events */
- target_register_event_callback(gdb_target_callback_event_handler, connection);
-
- /* a gdb session just attached, put the target in halt mode */
+ target_register_event_callback(gdb_target_callback_event_handler, connection);
+
+ /* a gdb session just attached, try to put the target in halt mode
+ * or alterantively try to issue a reset.
+ *
+ * GDB connection will fail if e.g. register read packets fail,
+ * otherwise resetting/halting the target could have been left to GDB init
+ * scripts
+ */
if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) &&
(retval != ERROR_TARGET_ALREADY_HALTED))
{
- ERROR("error when trying to halt target");
- exit(-1);
+ ERROR("error(%d) when trying to halt target, falling back to \"reset\"", retval);
+ command_run_line(connection->cmd_ctx, "reset");
}
-
- while (gdb_service->target->state != TARGET_HALTED)
- {
- gdb_service->target->type->poll(gdb_service->target);
- }
-
+
/* remove the initial ACK from the incoming buffer */
if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
return retval;
+ /* FIX!!!??? would we actually ever receive a + here???
+ * Not observed.
+ */
if (initial_ack != '+')
gdb_putback_char(connection, initial_ack);
/* if this connection registered a debug-message receiver delete it */
delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
-
+
if (connection->priv)
{
free(connection->priv);
}
target_unregister_event_callback(gdb_target_callback_event_handler, connection);
+ log_remove_callback(gdb_log_callback, connection);
return ERROR_OK;
}
* case an entire byte is shown. */
void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)
{
- static const char *DIGITS = "0123456789abcdef";
int i;
u8 *buf;
int buf_len;
buf = reg->value;
- buf_len = CEIL(reg->size, 8);
+ buf_len = CEIL(reg->size, 8);
if (target->endianness == TARGET_LITTLE_ENDIAN)
{
tstr[(buf_len-1-i)*2] = DIGITS[(buf[i]>>4)&0xf];
tstr[(buf_len-1-i)*2+1] = DIGITS[buf[i]&0xf];
}
- }
+ }
}
void gdb_target_to_str(target_t *target, char *tstr, char *str)
{
str[i] = tstr[i];
}
- }
+ }
}
int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
- switch (retval)
- {
- case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb requested registers but we're not halted, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- default:
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
- exit(-1);
- }
+ return gdb_error(connection, retval);
}
for (i = 0; i < reg_list_size; i++)
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
- switch (retval)
- {
- case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb tried to registers but we're not halted, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- default:
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
- exit(-1);
- }
+ return gdb_error(connection, retval);
}
packet_p = packet;
bin_buf = malloc(CEIL(reg_list[i]->size, 8));
str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16);
- /* get register arch_type, and call set method */
+ /* get register arch_type, and call set method */
arch_type = register_get_arch_type(reg_list[i]->arch_type);
if (arch_type == NULL)
{
}
arch_type->set(reg_list[i], bin_buf);
- /* advance packet pointer */
+ /* advance packet pointer */
packet_p += (CEIL(reg_list[i]->size, 8) * 2);
free(bin_buf);
free(hex_buf);
}
- /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
+ /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
free(reg_list);
gdb_put_packet(connection, "OK", 2);
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
- switch (retval)
- {
- case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb requested registers but we're not halted, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- default:
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
- exit(-1);
- }
+ return gdb_error(connection, retval);
}
if (reg_list_size <= reg_num)
if ((retval = target->type->get_gdb_reg_list(target, ®_list, ®_list_size)) != ERROR_OK)
{
- switch (retval)
- {
- case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb tried to set a register but we're not halted, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- default:
- /* this is a bug condition - get_gdb_reg_list() may not return any other error */
- ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
- exit(-1);
- }
+ return gdb_error(connection, retval);
}
if (reg_list_size < reg_num)
{
ERROR("gdb requested a non-existing register");
- return ERROR_SERVER_REMOTE_CLOSED;
+ return ERROR_SERVER_REMOTE_CLOSED;
}
if (*separator != '=')
bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16);
- /* get register arch_type, and call set method */
+ /* get register arch_type, and call set method */
arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
if (arch_type == NULL)
{
return ERROR_OK;
}
-int gdb_memory_packet_error(connection_t *connection, int retval)
+int gdb_error(connection_t *connection, int retval)
{
switch (retval)
{
- case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb tried to read memory but we're not halted, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- break;
case ERROR_TARGET_DATA_ABORT:
gdb_send_error(connection, EIO);
break;
case ERROR_TARGET_UNALIGNED_ACCESS:
gdb_send_error(connection, EFAULT);
break;
+ case ERROR_TARGET_NOT_HALTED:
+ gdb_send_error(connection, EFAULT);
+ break;
default:
- ERROR("BUG: unexpected error %i", retval);
- exit(-1);
+ /* This could be that the target reset itself. */
+ ERROR("unexpected error %i", retval);
+ gdb_send_error(connection, EFAULT);
+ break;
}
return ERROR_OK;
}
+/* We don't have to worry about the default 2 second timeout for GDB packets,
+ * because GDB breaks up large memory reads into smaller reads.
+ *
+ * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
+ */
int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
char *separator;
u8 *buffer;
char *hex_buffer;
- int i;
- int retval;
+ int retval = ERROR_OK;
/* skip command character */
packet++;
DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
- switch (len)
- {
- case 4:
- if ((addr % 4) == 0)
- retval = target->type->read_memory(target, addr, 4, 1, buffer);
- else
- retval = target->type->read_memory(target, addr, 1, len, buffer);
- break;
- case 2:
- if ((addr % 2) == 0)
- retval = target->type->read_memory(target, addr, 2, 1, buffer);
- else
- retval = target->type->read_memory(target, addr, 1, len, buffer);
- break;
- default:
- if (((addr % 4) == 0) && ((len % 4) == 0))
- retval = target->type->read_memory(target, addr, 4, len / 4, buffer);
- else
- retval = target->type->read_memory(target, addr, 1, len, buffer);
- }
+ retval = target_read_buffer(target, addr, len, buffer);
-#if 0
- if (retval == ERROR_TARGET_DATA_ABORT)
+ if ((retval == ERROR_TARGET_DATA_ABORT) && (!gdb_report_data_abort))
{
/* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
* At some point this might be fixed in GDB, in which case this code can be removed.
+ *
+ * OpenOCD developers are acutely aware of this problem, but there is nothing
+ * gained by involving the user in this problem that hopefully will get resolved
+ * eventually
+ *
* http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=2395
+ *
+ * For now, the default is to fix up things to make current GDB versions work.
+ * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
*/
memset(buffer, 0, len);
retval = ERROR_OK;
}
-#endif
if (retval == ERROR_OK)
{
hex_buffer = malloc(len * 2 + 1);
- for (i=0; i<len; i++)
- snprintf(hex_buffer + 2*i, 3, "%2.2x", buffer[i]);
+ int i;
+ for (i = 0; i < len; i++)
+ {
+ u8 t = buffer[i];
+ hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];
+ hex_buffer[2 * i + 1] = DIGITS[t & 0xf];
+ }
gdb_put_packet(connection, hex_buffer, len * 2);
}
else
{
- if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
- return retval;
+ retval = gdb_error(connection, retval);
}
free(buffer);
- return ERROR_OK;
+ return retval;
}
int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
buffer[i] = tmp;
}
- retval = ERROR_OK;
- switch (len)
- {
- /* handle sized writes */
- case 4:
- if ((addr % 4) == 0)
- retval = target->type->write_memory(target, addr, 4, 1, buffer);
- else
- retval = target->type->write_memory(target, addr, 1, len, buffer);
- break;
- case 2:
- if ((addr % 2) == 0)
- retval = target->type->write_memory(target, addr, 2, 1, buffer);
- else
- retval = target->type->write_memory(target, addr, 1, len, buffer);
- break;
- case 3:
- case 1:
- retval = target->type->write_memory(target, addr, 1, len, buffer);
- break;
- /* handle bulk writes */
- default:
- retval = target_write_buffer(target, addr, len, buffer);
- break;
- }
+ retval = target_write_buffer(target, addr, len, buffer);
if (retval == ERROR_OK)
{
}
else
{
- if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
- return retval;
+ if ((retval = gdb_error(connection, retval)) != ERROR_OK)
+ return retval;
}
free(buffer);
u32 addr = 0;
u32 len = 0;
- u8 *buffer;
int retval;
/* skip command character */
}
retval = ERROR_OK;
- if( len ) {
-
- buffer = malloc(len);
-
+ if (len)
+ {
DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
- memcpy( buffer, separator, len );
-
- switch (len)
- {
- case 4:
- if ((addr % 4) == 0)
- retval = target->type->write_memory(target, addr, 4, 1, buffer);
- else
- retval = target->type->write_memory(target, addr, 1, len, buffer);
- break;
- case 2:
- if ((addr % 2) == 0)
- retval = target->type->write_memory(target, addr, 2, 1, buffer);
- else
- retval = target->type->write_memory(target, addr, 1, len, buffer);
- break;
- case 3:
- case 1:
- retval = target->type->write_memory(target, addr, 1, len, buffer);
- break;
- default:
- retval = target_write_buffer(target, addr, len, buffer);
- break;
- }
-
- free(buffer);
+ retval = target_write_buffer(target, addr, len, (u8*)separator);
}
if (retval == ERROR_OK)
}
else
{
- if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
- return retval;
+ if ((retval = gdb_error(connection, retval)) != ERROR_OK)
+ return retval;
}
return ERROR_OK;
}
}
-int gdb_bp_wp_packet_error(connection_t *connection, int retval)
-{
- switch (retval)
- {
- case ERROR_TARGET_NOT_HALTED:
- ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection");
- return ERROR_SERVER_REMOTE_CLOSED;
- break;
- case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:
- gdb_send_error(connection, EBUSY);
- break;
- default:
- ERROR("BUG: unexpected error %i", retval);
- exit(-1);
- }
-
- return ERROR_OK;
-}
-
int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
int type;
{
if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
{
- if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
+ if ((retval = gdb_error(connection, retval)) != ERROR_OK)
return retval;
}
else
{
if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
{
- if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
+ if ((retval = gdb_error(connection, retval)) != ERROR_OK)
return retval;
}
else
return;
}
int first = 1;
-
+
for (;;)
{
if ((*xml == NULL) || (!first))
{
/* start by 0 to exercise all the code paths.
* Need minimum 2 bytes to fit 1 char and 0 terminator. */
-
+
*size = *size * 2 + 2;
char *t = *xml;
*xml = realloc(*xml, *size);
return;
}
}
-
- va_list ap;
- int ret;
- va_start(ap, fmt);
- ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
- va_end(ap);
- if ((ret > 0) && ((ret + 1) < *size - *pos))
- {
- *pos += ret;
- return;
- }
- /* there was just enough or not enough space, allocate more. */
- first = 0;
+
+ va_list ap;
+ int ret;
+ va_start(ap, fmt);
+ ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
+ va_end(ap);
+ if ((ret > 0) && ((ret + 1) < *size - *pos))
+ {
+ *pos += ret;
+ return;
+ }
+ /* there was just enough or not enough space, allocate more. */
+ first = 0;
}
}
-static int decode_xfer_read (char *buf, char **annex, int *ofs, unsigned int *len)
+static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
{
char *separator;
-
+
/* Extract and NUL-terminate the annex. */
*annex = buf;
while (*buf && *buf != ':')
if (*buf == '\0')
return -1;
*buf++ = 0;
-
+
/* After the read marker and annex, qXfer looks like a
* traditional 'm' packet. */
-
+
*ofs = strtoul(buf, &separator, 16);
if (*separator != ',')
return -1;
*len = strtoul(separator+1, NULL, 16);
-
+
return 0;
}
+int gdb_calc_blocksize(flash_bank_t *bank)
+{
+ int i;
+ int block_size = 0xffffffff;
+
+ /* loop through all sectors and return smallest sector size */
+
+ for (i = 0; i < bank->num_sectors; i++)
+ {
+ if (bank->sectors[i].size < block_size)
+ block_size = bank->sectors[i].size;
+ }
+
+ return block_size;
+}
+
int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
{
command_context_t *cmd_ctx = connection->cmd_ctx;
-
+
if (strstr(packet, "qRcmd,"))
{
if (packet_size > 6)
cmd[i] = tmp;
}
cmd[(packet_size - 6)/2] = 0x0;
+
+ /* We want to print all debug output to GDB connection */
+ log_add_callback(gdb_log_callback, connection);
target_call_timer_callbacks();
command_run_line(cmd_ctx, cmd);
+ log_remove_callback(gdb_log_callback, connection);
free(cmd);
}
gdb_put_packet(connection, "OK", 2);
if (packet_size > 5)
{
int retval;
- u8 gdb_reply[10];
+ char gdb_reply[10];
char *separator;
u32 checksum;
u32 addr = 0;
u32 len = 0;
-
+
/* skip command character */
packet += 5;
-
+
addr = strtoul(packet, &separator, 16);
-
+
if (*separator != ',')
{
ERROR("incomplete read memory packet received, dropping connection");
return ERROR_SERVER_REMOTE_CLOSED;
}
-
+
len = strtoul(separator + 1, NULL, 16);
-
+
retval = target_checksum_memory(target, addr, len, &checksum);
-
+
if (retval == ERROR_OK)
{
snprintf(gdb_reply, 10, "C%8.8x", checksum);
}
else
{
- if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
- return retval;
+ if ((retval = gdb_error(connection, retval)) != ERROR_OK)
+ return retval;
}
-
+
return ERROR_OK;
}
}
int pos = 0;
int size = 0;
- xml_printf(&retval, &buffer, &pos, &size,
+ xml_printf(&retval, &buffer, &pos, &size,
"PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-",
(GDB_BUFFER_SIZE - 1), gdb_use_memory_map == 1 ? '+' : '-');
-
+
if (retval != ERROR_OK)
{
gdb_send_error(connection, 01);
return ERROR_OK;
}
-
+
gdb_put_packet(connection, buffer, strlen(buffer));
free(buffer);
-
+
return ERROR_OK;
}
else if (strstr(packet, "qXfer:memory-map:read::"))
{
/* We get away with only specifying flash here. Regions that are not
- * specified are treated as if we provided no memory map(if not we
+ * specified are treated as if we provided no memory map(if not we
* could detect the holes and mark them as RAM).
* Normally we only execute this code once, but no big deal if we
* have to regenerate it a couple of times. */
-
+
flash_bank_t *p;
char *xml = NULL;
int size = 0;
int pos = 0;
int retval = ERROR_OK;
-
+
int offset;
int length;
char *separator;
-
+ int blocksize;
+
/* skip command character */
packet += 23;
-
+
offset = strtoul(packet, &separator, 16);
length = strtoul(separator + 1, &separator, 16);
-
+
xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
-
- int i = 0;
- for (;;)
+
+ int i;
+ for (i=0; i<flash_get_bank_count(); i++)
{
p = get_flash_bank_by_num(i);
if (p == NULL)
break;
-
+
+ /* if device has uneven sector sizes, eg. str7, lpc
+ * we pass the smallest sector size to gdb memory map */
+ blocksize = gdb_calc_blocksize(p);
+
xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
"<property name=\"blocksize\">0x%x</property>\n" \
"</memory>\n", \
- p->base, p->size, p->size/p->num_sectors);
- i++;
+ p->base, p->size, blocksize);
}
-
+
xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
if (retval != ERROR_OK)
gdb_send_error(connection, retval);
return retval;
}
-
+
if (offset + length > pos)
{
length = pos - offset;
t[0] = 'l';
memcpy(t + 1, xml + offset, length);
gdb_put_packet(connection, t, length + 1);
-
+
free(t);
free(xml);
return ERROR_OK;
}
else if (strstr(packet, "qXfer:features:read:"))
- {
+ {
char *xml = NULL;
int size = 0;
int pos = 0;
int retval = ERROR_OK;
-
+
int offset;
- int length;
+ unsigned int length;
char *annex;
-
+
/* skip command character */
packet += 20;
-
- if (decode_xfer_read( packet, &annex, &offset, &length ) < 0)
+
+ if (decode_xfer_read(packet, &annex, &offset, &length) < 0)
{
gdb_send_error(connection, 01);
return ERROR_OK;
}
-
+
if (strcmp(annex, "target.xml") != 0)
{
gdb_send_error(connection, 01);
return ERROR_OK;
}
-
+
xml_printf(&retval, &xml, &pos, &size, \
"l<target version=\"1.0\">\n<architecture>arm</architecture>\n</target>\n");
-
+
if (retval != ERROR_OK)
{
gdb_send_error(connection, retval);
return retval;
}
-
+
gdb_put_packet(connection, xml, strlen(xml) + 1);
-
+
free(xml);
return ERROR_OK;
}
-
+
gdb_put_packet(connection, "", 0);
return ERROR_OK;
}
int result;
/* if flash programming disabled - send a empty reply */
-
+
if (gdb_flash_program == 0)
{
gdb_put_packet(connection, "", 0);
return ERROR_OK;
}
-
+
if (strstr(packet, "vFlashErase:"))
{
unsigned long addr;
unsigned long length;
-
+
char *parse = packet + 12;
if (*parse == '\0')
{
ERROR("incomplete vFlashErase packet received, dropping connection");
return ERROR_SERVER_REMOTE_CLOSED;
}
-
- /* disable gdb output while programming */
- gdb_connection->output_disable = 1;
-
+
/* assume all sectors need erasing - stops any problems
* when flash_write is called multiple times */
flash_set_dirty();
-
+
/* perform any target specific operations before the erase */
target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM);
-
+
/* perform erase */
if ((result = flash_erase_address_range(gdb_service->target, addr, length)) != ERROR_OK)
{
}
else
gdb_put_packet(connection, "OK", 2);
-
- /* reenable gdb output */
- gdb_connection->output_disable = 0;
-
+
return ERROR_OK;
}
return ERROR_SERVER_REMOTE_CLOSED;
}
length = packet_size - (parse - packet);
-
- /* disable gdb output while programming */
- gdb_connection->output_disable = 1;
-
+
/* create a new image if there isn't already one */
if (gdb_connection->vflash_image == NULL)
{
gdb_put_packet(connection, "OK", 2);
- /* reenable gdb output */
- gdb_connection->output_disable = 0;
-
return ERROR_OK;
}
if (!strcmp(packet, "vFlashDone"))
{
u32 written;
- char *error_str;
- /* disable gdb output while programming */
- gdb_connection->output_disable = 1;
-
/* process the flashing buffer. No need to erase as GDB
* always issues a vFlashErase first. */
- if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, &error_str, NULL, 0)) != ERROR_OK)
+ if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0)) != ERROR_OK)
{
if (result == ERROR_FLASH_DST_OUT_OF_BANK)
gdb_put_packet(connection, "E.memtype", 9);
else
gdb_send_error(connection, EIO);
-
- if (error_str)
- {
- ERROR("flash writing failed: %s", error_str);
- free(error_str);
}
- }
else
{
DEBUG("wrote %u bytes from vFlash image to flash", written);
gdb_put_packet(connection, "OK", 2);
}
-
+
image_close(gdb_connection->vflash_image);
free(gdb_connection->vflash_image);
gdb_connection->vflash_image = NULL;
-
- /* reenable gdb output */
- gdb_connection->output_disable = 0;
-
+
return ERROR_OK;
}
case GDB_DETACH_RESUME:
target->type->resume(target, 1, 0, 1, 0);
break;
-
+
case GDB_DETACH_RESET:
target_process_reset(connection->cmd_ctx);
break;
-
+
case GDB_DETACH_HALT:
target->type->halt(target);
break;
-
+
case GDB_DETACH_NOTHING:
break;
}
-
+
gdb_put_packet(connection, "OK", 2);
-
+
return ERROR_OK;
}
-int gdb_input(connection_t *connection)
+static void gdb_log_callback(void *priv, const char *file, int line,
+ const char *function, const char *string)
+{
+ connection_t *connection = priv;
+ gdb_connection_t *gdb_con = connection->priv;
+
+ if (gdb_con->busy)
+ {
+ /* do not reply this using the O packet */
+ return;
+ }
+
+ gdb_output_con(connection, string);
+}
+
+int gdb_input_inner(connection_t *connection)
{
gdb_service_t *gdb_service = connection->service->priv;
target_t *target = gdb_service->target;
packet_size = GDB_BUFFER_SIZE-1;
if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
{
- switch (retval)
- {
- case ERROR_GDB_BUFFER_TOO_SMALL:
- ERROR("BUG: buffer supplied for gdb packet was too small");
- exit(-1);
- case ERROR_SERVER_REMOTE_CLOSED:
- return ERROR_SERVER_REMOTE_CLOSED;
- default:
- ERROR("BUG: unexpected error");
- exit(-1);
- }
+ return retval;
}
/* terminate with zero */
switch (packet[0])
{
case 'H':
- /* Hct... -- set thread
+ /* Hct... -- set thread
* we don't have threads, send empty reply */
gdb_put_packet(connection, NULL, 0);
break;
break;
case 'c':
case 's':
- gdb_step_continue_packet(connection, target, packet, packet_size);
+ {
+ /* We're running/stepping, in which case we can
+ * forward log output until the target is halted */
+ gdb_connection_t *gdb_con = connection->priv;
+ gdb_con->frontend_state = TARGET_RUNNING;
+ log_add_callback(gdb_log_callback, connection);
+ gdb_step_continue_packet(connection, target, packet, packet_size);
+ }
break;
case 'v':
retval = gdb_v_packet(connection, target, packet, packet_size);
return ERROR_OK;
}
+int gdb_input(connection_t *connection)
+{
+ int retval = gdb_input_inner(connection);
+ gdb_connection_t *gdb_con = connection->priv;
+ if (retval == ERROR_SERVER_REMOTE_CLOSED)
+ return retval;
+
+ /* logging does not propagate the error, yet can set th gdb_con->closed flag */
+ if (gdb_con->closed)
+ return ERROR_SERVER_REMOTE_CLOSED;
+
+ /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
+ return ERROR_OK;
+}
+
int gdb_init()
{
gdb_service_t *gdb_service;
return ERROR_OK;
}
}
-
+
WARNING("invalid gdb_detach configuration directive: %s", args[0]);
return ERROR_OK;
}
return ERROR_OK;
}
}
-
+
WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
return ERROR_OK;
}
return ERROR_OK;
}
}
-
+
WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
return ERROR_OK;
}
+int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+ if (argc == 1)
+ {
+ if (strcmp(args[0], "enable") == 0)
+ {
+ gdb_report_data_abort = 1;
+ return ERROR_OK;
+ }
+ else if (strcmp(args[0], "disable") == 0)
+ {
+ gdb_report_data_abort = 0;
+ return ERROR_OK;
+ }
+ }
+
+ WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);
+ return ERROR_OK;
+}
+
int gdb_register_commands(command_context_t *command_context)
{
register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
COMMAND_CONFIG, "");
register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
COMMAND_CONFIG, "");
+ register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
+ COMMAND_CONFIG, "");
return ERROR_OK;
}
projects / fw / openocd / blobdiff